Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.362s&link_type=abstract
Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:
Astronomy and Astrophysics
Astrophysics
Scientific paper
We carried out spectroscopic observation of GRO J1655-40 in various spectral states from 1994 to 1997. Strong emission from Hα, He II lambda4686 and the Bowen lines N III lambda4634, lambda4641 is observed during bright outburst states of the system. The lines have double-peaked profiles, a signature of an accretion disk; the Hα emission line profile varies with the orbital phase. We have studied the peak-to-peak separation in the various states, and the correlation between equivalent width of the Hα emission and the hard X-ray flux measured by BATSE. The Balmer lines also show a broad, shallow absorption trough, probably originating from the high-velocity inner-disk region. From the emission line profiles we infer that the outer region of the accretion disk is either sub-Keplerian or extends well beyond the largest non-intersecting orbit. Only narrow absorption lines from the companion star are visible in a low state.
Hunstead Richard W.
Soria Rob
Wu Ke
No associations
LandOfFree
High-resolution spectroscopy of GRO J1655-40 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with High-resolution spectroscopy of GRO J1655-40, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-resolution spectroscopy of GRO J1655-40 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-768802